| abstract |
The present invention is a lubricant base oil containing at least one hydrocarbon compound having a structure represented by the formulas (I) to (VI) as a basic skeleton, having a viscosity at −40 ° C. of 40 Pa · s or less, and a viscosity index of 80 or more. Provided are lubricating oil base oils and lubricating oil compositions which satisfy the traction coefficient, low temperature fluidity and viscosity index in high dimensions. Formula I (Wherein p represents an integer of 1 to 10, except that in formulas I and II, p is not 1) |